What is the general requirement for isolating devices used in PV systems regarding their listing?

In photovoltaic (PV) systems, isolating devices are crucial for ensuring safety and functionality during maintenance and emergency situations. The general requirement regarding these devices is that they must be listed and identified for specific use. This means that isolating devices should meet specific performance standards and be tested to ensure they are suitable for their intended application within the PV system.

Devices that are listed for specific use are typically designed and manufactured to handle the unique electrical parameters and environmental conditions encountered in solar power applications. These devices are assessed through certification processes, demonstrating that they comply with relevant safety and performance standards established by recognized testing laboratories.

Using devices that are properly listed and identified significantly reduces the risks associated with electrical malfunctions, improves safety for personnel, and ensures compliance with the National Electrical Code (NEC). This requirement also helps streamline inspections and audits by ensuring that all equipment used in the system is suitable and reliable for its intended purpose.